公开(公告)号：US07197866B2

公开(公告)日：2007-04-03

申请号：US10705436

申请日：2003-11-10

Applicant: Jeffrey A. Cook ,  Richard E. Soltis ,  Alex D. Colvin ,  Jessy Grizzle

Inventor： Jeffrey A. Cook ,  Richard E. Soltis ,  Alex D. Colvin ,  Jessy Grizzle

IPC: F01N3/00

CPC classification number: F02D41/1454 ,  F02D41/1441 ,  F02D41/1456

Abstract: Electronic circuitry and control algorithms are described to automatically establish the output voltage of a linear exhaust gas oxygen sensor (e.g., a UEGO sensor) corresponding to an exhaust air-fuel ratio of stoichiometry. The apparatus and control logic herein described may be used to adaptively correct the setpoint of an air-fuel ratio control system in which a UEGO sensor is used in a feedback loop to adjust the fuel injection quantity of an internal combustion engine.

Abstract translation: 描述电子电路和控制算法以自动建立对应于化学计量的排气空燃比的线性排气氧传感器（例如，UEGO传感器）的输出电压。 这里描述的装置和控制逻辑可以用于自适应地校正其中在反馈回路中使用UEGO传感器以调节内燃机的燃料喷射量的空燃比控制系统的设定点。

公开(公告)号：US5456124A

公开(公告)日：1995-10-10

申请号：US218773

申请日：1994-03-28

Applicant: Alex D. Colvin

Inventor： Alex D. Colvin

IPC: G01F1/48 ,  G01M15/10 ,  G01N1/22 ,  G01N1/24 ,  G01N11/08 ,  G01L3/26

CPC classification number: G01F1/48 ,  G01M15/102 ,  G01N1/2258 ,  G01N1/2252 ,  G01N1/24 ,  G01N11/08 ,  G01N2001/2261

Abstract: Exhaust gas constituents of an exhaust gas stream are measured by drawing a proportional sample of exhaust gas through a capillary tube inserted into the exhaust gas stream. The capillary tube is controllably heated to avoid distortion of the reading due to condensation. The mass flowing in the capillary tube is determined by sensing the pressure drop across the length of the capillary tube.

Abstract translation: 废气流的废气成分是通过抽出比例样品的废气通过插入废气流中的毛细管来测量的。 可控地加热毛细管，以避免由于冷凝引起的读数变形。 在毛细管中流动的质量通过感测毛细管长度上的压降来确定。

公开(公告)号：US5117680A

公开(公告)日：1992-06-02

申请号：US727038

申请日：1991-07-08

Applicant: Alex D. Colvin

Inventor： Alex D. Colvin

IPC: G01N27/44

CPC classification number: G01N27/44

Abstract: Provided is a method and circuit for measuring on a real-time basis trace constituents in vehicle engine exhaust. The control circuit operates to maintain a small, constant concentration of a selected electrolyte constituent reactive with the exhaust constituent sought to be measured. The amount of current necessary to regenerate and maintain the concentration of the selected electrolyte constituent is continuously measured to generate a real-time electrical signal proportional to the mass flow of the exhaust constituent entering the electrochemical cell.

Abstract translation: 提供了一种用于实时测量车辆发动机排气中的痕量成分的方法和电路。 控制电路操作以维持与寻求测量的排气组分反应的选定的电解质组分的小的恒定浓度。 连续地测量再生和保持所选择的电解质成分浓度所需的电流量，以产生与进入电化学电池的排气组分的质量流量成比例的实时电信号。

公开(公告)号：US4372155A

公开(公告)日：1983-02-08

申请号：US265316

申请日：1981-05-20

Applicant: James W. Butler ,  Alex D. Colvin ,  Dennis Schuetzle

Inventor： James W. Butler ,  Alex D. Colvin ,  Dennis Schuetzle

IPC: G01M15/04 ,  F02B77/08 ,  F02D35/00 ,  G01N27/409 ,  G01N31/12 ,  G01N33/00 ,  G01M15/00

CPC classification number: F02B77/086 ,  G01N31/12 ,  G01N33/0013

Abstract: This specification teaches a basic method of obtaining on a continuous basis an instantaneous indication of the air to fuel ratio of an air/fuel mixture being fed to a combustion process. The process may take place in an internal combustion engine or, for example, in a power plant. Modifications of the method are taught to obtain such information as the hydrogen to carbon ratio of the fuel being burned in the combustion process, the oxygen equivalence of the air/fuel mixture being burned, the air mass flow through the combustion process, the fuel mass flow through the combustion process, instantaneous fuel economy of a vehicle in which a combustion process is being carried out to propel the vehicle, and the oxygen concentration in the exhaust gases from the combustion process.

Abstract translation: 本说明书教导了连续获得供给到燃烧过程的空气/燃料混合物的空燃比的瞬时指示的基本方法。 该过程可以在内燃机中或例如在发电厂中进行。 教导了该方法的修改以获得诸如在燃烧过程中被燃烧的燃料的氢碳比，燃烧的空气/燃料混合物的氧等价物，通过燃烧过程的空气质量流量，燃料质量 流过燃烧过程，其中进行燃烧过程以推动车辆的车辆的瞬时燃料经济性和来自燃烧过程的废气中的氧浓度。

公开(公告)号：US5138163A

公开(公告)日：1992-08-11

申请号：US756701

申请日：1991-09-09

Applicant: James W. Butler ,  Alex D. Colvin ,  Thomas J. Korniski

Inventor： James W. Butler ,  Alex D. Colvin ,  Thomas J. Korniski

IPC: G01N1/22 ,  G01N1/24 ,  G01N1/28 ,  G01N1/38 ,  G01N21/35 ,  G01N33/00

CPC classification number: G01N33/0011 ,  G01N21/3504 ,  G01N33/0016 ,  G01N1/2252 ,  G01N1/24 ,  G01N1/38 ,  G01N2001/2264 ,  G01N2021/3595

Abstract: A method and associated apparatus for on-line gas analysis of a multicomponent gas emission flow, comprising: continuously withdrawing and regulating the pressure of a first sample flow from the emission flow, continuously withdrawing a second sample flow from the first sample flow, the second flow sample being diluted with mass controlled amounts of diluent (N.sub.2 or air) to lower the dew point of the gas sample to below room temperature; controlling the absolute pressure of the diluted sample to the range of 920-950 mbar; frequently periodically analyzing the diluted sample flow, controlled as to pressure, by fourier-transform infrared spectrometric techniques to render a concentration measurement for each desired gas species; and correcting each concentration measurement for dilution to derive an undiluted concentration measurement representative of the actual exhaust gas, said correction being accomplished by measuring the actual air/fuel ratio of the gas emission flow to provide a theoretical carbon concentration in the undiluted exhaust gas and thereafter ratioing the theoretical total carbon concentration to the measured carbon concentration in the sample to provide the needed correction factor.

公开(公告)号：US5129257A

公开(公告)日：1992-07-14

申请号：US633925

申请日：1990-12-26

Applicant: Keith R. Carduner ,  Alex D. Colvin ,  Dick Y. W. Leong

Inventor： Keith R. Carduner ,  Alex D. Colvin ,  Dick Y. W. Leong

IPC: G01N27/44

CPC classification number: G01N27/44

Abstract: A system for measuring an automotive engine exhaust constituent includes a meter for measuring the mass of air flowing through the engine and for generating a flow signal corresponding to the airflow, and a sample handling apparatus for separating a fraction of the exhaust flowing through the engine and for conducting the exhaust fraction to an analyzer. The system further includes diluent adding means for doping the extracted exhaust fraction with a diluent gas upstream of the analyzer and a processor for receiving the mass flow signal from the engine mass flow meter and for operating the diluent adding device in response to the flow signal. The processor operates the diluent valve such that the flow rate of exhaust gas into the analyzer remains a relatively constant fraction of the total exhaust flowing from the engine.

Abstract translation: 用于测量汽车发动机排气成分的系统包括用于测量流过发动机的空气质量并用于产生对应于气流的流量信号的仪表，以及用于分离流过发动机的排气的一部分的样品处理设备，以及 用于将排气馏分导入分析器。 该系统还包括稀释剂添加装置，用于将提取的废气馏分与分析器上游的稀释气体掺杂;以及处理器，用于接收来自发动机质量流量计的质量流量信号，并响应于流量信号操作稀释剂添加装置。 处理器操作稀释剂阀，使得进入分析器的废气的流量保持从发动机流出的总排气的相对恒定的分数。

公开(公告)号：US5014011A

公开(公告)日：1991-05-07

申请号：US200284

申请日：1988-05-31

Applicant: Alex D. Colvin

Inventor： Alex D. Colvin

IPC: G01N27/22 ,  G01R27/26

CPC classification number: G01N27/221 ,  G01R27/2605

Abstract: A circuit and method for measuring the capacitance of a medium independent of the resistivity of the medium. A triangular voltage is applied to plates immersed in the medium to generate both a resistive current component in phase with the triangular voltage and a capacitive current component in phase with a differential of the triangular voltage. The resistive and capacitive current components are summed with a selectable current which is provided having a phase .pi. radians out of phase with the triangular voltage and having an amplitude related to a control signal. The summed current is sampled over a time period phase shifted from the capacitive current component and then integrated so that the capacitive current component integrates to zero and the integral of the resistive current component minus the selectable current provides the control signal. In response to the control signal, the selectable current is varied until the sum of the selectable current and resistive current component are nulled. This summed current is then sampled in phase with the capacitive current component thereby obtaining a measurment of capacitance independent of resistance.

公开(公告)号：US4928015A

公开(公告)日：1990-05-22

申请号：US252960

申请日：1988-10-03

Applicant: James W. Butler ,  Thomas J. Korniski ,  Alex D. Colvin

Inventor： James W. Butler ,  Thomas J. Korniski ,  Alex D. Colvin

IPC: G01J3/28 ,  G01J3/453 ,  G01N1/28 ,  G01N1/38 ,  G01N21/35 ,  G01N33/00

CPC classification number: G01N33/0016 ,  G01J3/453 ,  G01N21/3504 ,  G01J2003/2866 ,  G01N1/38 ,  G01N2001/383 ,  G01N2001/388 ,  G01N2021/3595 ,  G01N2201/1215

Abstract: A method is disclosed of making an on-line gas analysis of a multicomponent gas emission flow by (a) continuously sequestering a sample flow from the gas emission flow, which sample flow may be filtered to substantially eliminate solid or liquid particles, diluted to lower its dew point to below room temperature, and changed in either temperature and/or pressure to be substantially the same in temperature and pressure as that of gases used to create reference transmission frequency spectral data employed in step (d); (b) continuously irradiating the sample flow with an electromagnetic radiation beam while modulating the amplitude of infrared frequencies in the audio frequency range of the beam, either prior to or immediately subsequent to irradiation of the sample flow, to produce electromagnetic signals having discernible amplitude variations resulting from spectral interference patterns; (c) detecting and collecting the signals at a sufficiently high rate to substantially completely distinguish between adjacent spectral pattern amplitude peaks without mutual spectral interference and to permit analysis of the signals in real time; and (d) analyzing the signals in real time by (i) mathematically manipulating the signals in accordance with Beer's Law to create reformed background-corrected data, and (ii) applying reference transmission frequency spectral data to the reformed data for each suspected gaseous component to give a linear quantitative measure of the presence of each and every suspected gas component in the gas emission flow.

Abstract translation: 公开了一种通过以下方法来进行多组分气体排放流的在线气体分析：（a）从气体排放流中连续隔离样品流，该样品流可被过滤以基本上消除固体或液体颗粒，稀释至较低 其露点低于室温，并且在温度和/或压力下变化为与用于产生步骤（d）中使用的参考透射频谱数据的气体的温度和压力基本相同; （b）在对样品流的照射之前或紧随其后的同时调制光束的音频范围内的红外频率的幅度，同时用电磁辐射束连续照射样品流，以产生具有可辨别的幅度变化的电磁信号 由光谱干涉图形引起; （c）以足够高的速率检测和收集信号，以基本上完​​全区分没有相互频谱干扰的相邻频谱图幅度峰值，并允许实时分析信号; 和（d）通过（i）根据“啤酒定律”数学地操纵信号以实时地分析信号，以产生经改良的背景校正数据，以及（ii）将参考传输频谱数据应用于每个可疑气体组分的重整数据 对气体排放流中每个可疑气体成分的存在进行线性定量测量。

公开(公告)号：US4751466A

公开(公告)日：1988-06-14

申请号：US5184

申请日：1987-01-20

Applicant: Alex D. Colvin ,  James W. Butler

Inventor： Alex D. Colvin ,  James W. Butler

IPC: G01N27/06 ,  G01N27/07 ,  G01N33/32 ,  G01N27/08

CPC classification number: G01N27/06 ,  G01N27/07 ,  G01N33/32

Abstract: The invention is directed to an instrument for measuring the absolute electrical conductivity of liquids, which instrument may be employed on-line in a recirculating paint bath to measure the conductivity of the paint. The instrument comprises a four electrode probe and a meter which comprises a device for generating and controlling an AC current connected to the first electrode such that a constant AC voltage is maintained across the second and fourth electrodes and a device for measuring and detecting an AC current connected to the third electrode, wherein the fourth electrode is maintained at the same potential as a nearby ground.

Abstract translation: 本发明涉及一种用于测量液体的绝对电导率的仪器，该仪器可以在再循环涂漆浴中在线使用以测量涂料的导电性。 该仪器包括四个电极探针和一个仪表，其包括用于产生和控制连接到第一电极的AC电流的装置，使得跨越第二和第四电极保持恒定的AC电压，以及用于测量和检测AC电流的装置 连接到第三电极，其中第四电极被保持在与附近地面相同的电位。

公开(公告)号：US5025220A

公开(公告)日：1991-06-18

申请号：US410772

申请日：1989-09-21

Applicant: Alex D. Colvin ,  Daniel J. Graham ,  Joseph C. Cassatta

Inventor： Alex D. Colvin ,  Daniel J. Graham ,  Joseph C. Cassatta

IPC: G01N27/07

CPC classification number: G01N27/07

Abstract: A method and apparatus for measuring the electrical conductivity of a liquid comprises an electrically insulating housing through which the liquid flows, and four electrodes inserted into the path of the liquid flowing through the housing. The first and third electrodes are current electrodes and the second and fourth electrodes are voltage electrodes. An AC current is injected into the first current electrode and exits at the second current electrode, with the resulting AC voltage across the voltage electrodes being measured. The first current electrode is driven to maintain a constant value of AC voltage on the voltage electrodes while measuring the current flow in the second current electrode which is representative of the electrical conductivity of the liquid. A DC bias voltage source is provided and is coupled to each of the electrodes by a resistor and a capacitor to prevent coating or plating of the electrodes. The method and apparatus permit continuous monitoring of the absolute conductivity of a liquid.

Abstract translation: 用于测量液体的导电性的方法和装置包括电绝缘壳体，液体流过该壳体，并且四个电极插入流过壳体的液体的路径中。 第一和第三电极是电流电极，第二和第四电极是电压电极。 交流电流被注入到第一电流电极中并在第二电流电极处退出，并且测量所述电压电极两端的所得交流电压。 第一电流电极被驱动以在电压电极上保持恒定的AC电压值，同时测量代表液体的电导率的第二电流电极中的电流。 提供DC偏置电压源并通过电阻器和电容器耦合到每个电极以防止电极的涂覆或电镀。 该方法和装置允许连续监测液体的绝对电导率。